Form apparatus for producing concrete slabs



Nov. 20, 1934. G. w. GILLELAND FORM APPARATUS FOR PRODUCING CONCRETE SLABS Filed Sept. 28, 1931 5 Sheets-Sheet l NVENTOR. Q14. Mala/a2.

ATTGRI EY Nov. 20, 1934- G. w. GILLELAND 1,931,036

FORM APPARATUS FOR PRODUCING CONCRETE SLABS Filed Sept. 28, 1931 5 Sheets-Sheet 2 Nov. 20, 1934. a. w. GILLELAND FORM APPARATUS FOR PRODUCING CONCRETE SLABS Fild Sept. 28, 1931 5 Sheets-Sheet 5 INVENTOR. G74. Zela/zd Nov. 20, 1934.. G. w. GILLELAND FORM APPARATUS FOR PRODUCING CONCRETE. SLABS Filed Sept. 28, 1951 5 Sheets-Sheet 4 Nov. 20,1934. aw. GILLELAND v 1,981,036

FORM APPARATUS FOR PRODUCING CONCRETE SLABS Filed se i. 2a, 1931 5 Sheets-Shea? 5 of cement slabs Patented Nov. 20, 1934 PATENT OFFICE CONCRETE SLABS FORM APPARATUS FOR PRODUCING Grover W. Gilleland, Parsons, Kans. Application September 28, 1931, Serial No. 565,446

17 Claims.

The product objective is an oblong rectangular cement slab having a continuous depending rib near and parallel with its outer margin, the slab being primarily designed to serve as a mausoleum cover or grave marker. A slab of the character outlined is not novel, but as heretofore produced by conventional forms or molds, was not of uniform density and strength, and its corner lines were not as sharply defined as desirable for aesthetic appeal. The primary object is to produce slabs of substantially uniform density and strength and identical contour and size with sharply defined corner lines. A furtherobject is to produce apparatus whereby the production shall be facilitated and cheapened.

With the above-mentioned objects in view, the invention consists in certain novel and useful features of construction and combination of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawings, in which:

Figure l is a top plan view'of slab form or mold appliances embodying the invention, a fragment of the slab being shown and certain parts appearing in dotted lines merely to locate them as they are removed to permit the central part of the slab to be formed.

Figure 2 is a side elevation broken at one end to disclose certain internal construction, the dotted parts referred to in the reference to Figure 1, being omitted.

Figure 3 is a cross section omitting certain features disclosed by the preceding figures, and indicating a tank as arranged for a preliminary curingphase of the slab production. v

Figure 4 is a longitudinal section of part of the apparatus as employed in the final stage of the construction of the main or body portion of the slab.

Figure 5 is a fragmentary vertical side cross section disclosing parts employed in an earlier step or stage in the production of the slab than that of Figure 4.

Figure 6 is a fragmentary vertical cross section disclosing parts employed between the steps represented by Figures 5 and 4.

Figure '7 is a fragmentary vertical cross section of parts employed in the step immediately following the step of Figure 6.

Figure 8 is a fragmentary cross section of parts essential in the final curing of the completed slab.

Figure 9 is an enlarged fragmental cross section in a' perfectly horizontal position showing the rear side of the parts of the mold necessary for the production of the head piece, the section being taken on the line IX--IX of Figure 1.

Figure 10 is a detail perspective view of the parts of one of the clamping features of the mold.

Figure 12 is a detail perspective view of a completed slab.

Figure 13 is a section on the line XIII-XIII of Figure 14.

Figure 14 is a perspective view to show the construction of the head-piece mold and its relation to the main or body-portion mold.

In the said drawings, an. oblong rectangular metal main frame of which the sides and ends are of approximately step form in cross section, may be of one-piece construction but is shown as consisting of two rigidly connected rightangle shaped frames disposed in inverted relation, the outer one comprising a vertical arm 1 provided at its upper edge with an outwardlyprojecting flange 2, and the inner one consists of a vertical arm 3 fitted against the inner side of arm 1 and an inwardly-projecting flange 4.

At each side of and secured to said frame, is a pair of angle brackets 5 secured to cross channel beams 6 mounted on cross drop frames '7 secured on the upper channel members 8 of vertical supporting legs, the lower leg member 9 being tubular and equipped with clamps 10 which secure the members 8 and 9 together. Bases 11 fastened upon the ground or a floor foundation, have upstanding threaded extensions 12 connected by threaded couplings 13 to the lower ends of members 9 so that the leg supports are adjustable to permit of the support of the rectangular frame and at the desired'height or elevation.

A bottom plate to conform to and form the ,underside of the slab, corresponds in area to the rectangular frame and comprises a central or body portion 14 of transversely-arched form, a depending hollow rectangular rib 15 to fit down upon the flange 4 of said frame and an outwardlyprojecting flange 16 disposed flatly upon the flange 2 of said frame, the opposed walls of the rib extending convergingly downward. As the plate is preferably of relatively thin metal, it is desirable to reinforce it and this is accomplished 1 by cross plates 17. conforming to the cross-sectional form of the plate and at their ends extended to fit against the inner side walls of the ribs 15 and under the flange as at 18. The body portion 14 of the plate is provided with four opena relation .to crfosszplate mesh with bevel gears 37 rotatable with gears 38 the rectangular frame, as

in the same horizontal plane, 1 screw bolts 32-v will leave the associated screw 23 free'to be turned enough to, bring ings 19 (two only appearing, see Figure 3) relatively disposed in pairs near the respective ends of the body portion, and said openings register with somewhat smaller openings 20 in the cross plates 17, and underlying and spaced from plates 1'7 by filler plates 21 having registering holes 22, are plates 23 having openings registering with but smaller than the openingsof platesl'l and 21.

Jack heads 25 to fit in openings 19, 20 and 22 and upon plates 23, having top plates 26 to close openings 19 and projections 27 depending o h openings 24 and swivelled on vertical screws 28 extending down through guide sleeves 29 secured to and through bridge plates 6.

' The screws also extend down through drop plates '7, and corresponding pairs are swivelled at their 7 lower ends in cross plates 30 and engaged at their lower ends by nuts 31 underlying said plates.

The plates 30 have diametrically opposite sets of bolts 32 for engagement with opposite holes of a 1 set 33 in each of a series of disks 34, there being one; of such disks swivelled on each screw between 1 a .shoulder. 35 thereon and each screw is a bevel gear 36 bearing a journaled '7, and said gears are in 39 on a longiengaging opposite sides of a gear :tudinal crank shaft'40 journaled in vertical bearing plates 41 connecting plates 6 and 'l. The

' shaft is also journaled in a bracket 42 connecting one of the plates 7 with the corresponding end of indicated by Figure 2. By ,means of the crank shaft the screws can be operated to move upward and raise the molded i-slab, as hereinafter-more particularly referred to,

and inthe event the heads of the jacks are not the removal of the its head to the desired level, the. screw bolts being then replaced to hold'thedisk 34in. rigid relation to the plate "'30 and hence insureuniform upward or down- .ward travel of theiscrews. lifting a partly cured It isessential that in slab, the pressure of the jacksshall be equal-so that the danger of fracturing theslab is minimized.

The jacks are employed to not only raise the I slabwhen fully cured or set to enable it to be totally withdrawn from the form, but to raise it is part way before it is fully curedso that it can be subjected to water treatment atgits underside and that its upper side is so. treated, and. to guard against leakage of water, each jackat the juncture of its head and screw is surroundediby a flexible water bag 43, the upper ends-of the bags being secured to plates 23'around the holes 24,.and'the lower ends of the bags-tothe lower endsof thereduced depending edges at the same time of the jack heads. The bagsare of such-proportion 'as .to permit the slab to be raised high enough to'be readily lifted off the'form, as will be "understood by reference to Figure 3.

"To define themarginal edgesof the slab, an

oblorig rectangular frame 44 of angle iron is supported by the flanges 2 of the main frame, and the upperedge ofeach .sideand end is sloped upward at 45 sothatthe upper surface portion of the: slab can be uniformly slopedby meansof a. conventional float or trowel. Inter- *pose'd between said frame and the marginal portion 16 of the plate 14, are four angle -which c'onjointly provide-la rectangular frame,

each plate having. anzflange 47' extending down- "*wardly into therespectiveside or end, of the hollow depending rectangular :rib 15, said flanges;

of the marginal plates 46 the upper ends of v -vention, that plate 30. Engaging are used on each side (Figure l) portions 27 v 62- ixbeing fitting flatly against the inner sides of the outer walls of said rib and having indented portions 48 whereby to produce a continuous external groove in and around the rib of the cement slab rib. Within the frame 44 the plates 46 are also struck upward as at 49, to provide a rectangular groove in the underside of the marginal portion of the slab, the two grooves beingadapted to be filled with a sealing compound in the event the slab is to be fitted in and upon the body portion of a cement box or mausoleum for containing a casket. If the slab is used merely as a grave markerv the grooves may be left unfilled. To

guard against'the possibility of the side horizontal arms 2 of the main frame springing, they are boltedat 50 to the channel cross plates 6 (Figures 2 and 3), and spacing sleeves or braces 50a are fitted on said bolts between said flanges and cross plates 6.

It is essential in accordance with the process of producinga slabiby the apparatus of this inthe frame 44 may be readily removed, and to secure it firmly. yetremovably in place; a number of clamping devices are employed. along the sides. As shown, three of such devices Each consists of a bolt 51 extending down through angle frame 44, plates-46 and 16 and flanges clutchtoothed sleeves 52 rigidly depending from flanges Nuts 53 engage the lowerends of the, bolts and gagement by a key head 5'7 having a radial opening 58 whereby the head can be slid sidewise into engagement with the neck portion and translate a downward pull on the bolt effected by cam action of sleeves 54 when turned by handle .55, on

sleeves 52-, into clamping action by the key heads on the horizontal arms of frame 44 to secure the latter in rigid relation to the main frame and the interposed parts, as most clearly shown by Figures 5 and6, itbeing noted that reverse turning movement of sleeves 54 permits the bolts to removethe clamping pressure so that the latter can be slid be slid upward to on the. key-heads out ,of engagement with the neck portions of the bolts and thus leave the latter, free to drop or be pulled down until totally withdrawn from the frame 44 and the underlying parts. This type of fastening means is employed at other points in the apparatus, and facilitates the work of assembly and separation of the parts by avoiding the necessity of using wrenches or other tools. I 1;

Within thespace encompassed by the depending rib 15 and near the respective sides of the latter, the plate 14 is equipped with a series of depending sleeves 59 bearing at their lower ends upon cross bars 60 secured to the side portions of the main frame and alined with cam toothed sleeve members 61 depending rigidly from said cross bars. Temporary bolts 62 (to be later replaced by bolts as hereinafter appears) extend down through the body-portion 14, the respective sleeves 59, cross-bars 60 and cam toothed sleeves 61 and differ from the bolts 51 only in length and in the fact that their key-heads 63 engage temporary washers 64 (Figure 5) seated upon temporary sleeves 64a fitting loosely around the bolts and upon the body portion 14, as shown clearly by Figures 5 and 6. With the several bolts 7 the preferred number-positioned as explained and clamping the sleeves 64a in position by means of nuts 65, and cam sleeves gg yea ' 66 operable by handles 6'7, plastic cement is deposited upon the plate 14 and built up within the angle frame 44 substantially as shown by the cement line in Figure 5. After a short period, usually about thirty minutes, the cam sleeves 66 are turned to remove the clamping pressure so that the key heads and washers can be removed. A rectangular gage frame 68 (Figure 6) is then fitted on the bolts 62 having depending sleeves 69 to fit within and fill sleeves 64a which are preferably of rubber hose. The frame 68 so supported is horizontal with its upper edge in a slightly higher plane than the beveled upper edge of frame 44, and the frame 68 is clamped firmly in place by the use of the key heads and the clamping elements described, at the lower ends of the bolts 62. With the parts thus arranged additional cement is depositedto build up between said frames to the dotted line (Figure 6) to complete the marginal portion of the slab, the two frames providing the resistance necessary to obtain the required density of the cement forming the marginal portion and rib, and serving as guides in the use of floats or trcwels in providing upper marginal surfaces for the slab, which slope downward and outward at corresponding angles, attention being called at this point to the fact that the shoulder formed on the slab by the frame 68 is a temporary one which does not appear in the completed slab. After the cement has set sun ciently to retain its shape, a rectangular angleiron frame '71 (see Figures 1, 2 and 7) is employed to contour or define the inner margin of the upper side of the marginal portion of the slab by the formation of a vertical edge on the bodyportion of the slab, the upper edges of the side walls of frame 71 serving as a gage for a slightly bowed float, not shown, to be slid along said side walls and give the body portion of the slab a top surface of convex form transversely, as hereinafter more particularly referred to, the upper edges of the walls of the frame being bevelled at 72 for the same reason given with reference to the bevelled edges 45 of frame 44. The frame '71 is preferably of sectional construction and is shown as composed of two similar straight sides and two ends of T-forin, with the parts clamped together by fastening devices 73, which are of the same construction as the parts 51 to 55 inclusive and hence are not described in detail. To support the frame 71 in horizontal position, angle brackets 74 connect the frame near its corners with the ends of frame 44. For further support, the frame is supported at its sides on inverted l. brackets 75 fitted on horizontal bolts 76 which also engage S-shaped brackets 77, provided with depending lugs 78 bearing on the frame 44. The upper ends of brackets 77 abut the brackets '75 and the lower ends of the former underlie the side flanges 2 of the main frame. Clamping bolts 79 extend through the brackets '7'? and bear against the undersides of the main frame, and wingheads 80 are provided for the bolts '76 and bear against the angle brackets 75. If either side of the frame 71 sags at an intermediate point, it can be jacked up by adjustment of the respective wing-bolt. After the frame 75 is secured in place as explained, a thin finish coating C of cement (Figure 7) is applied to the inner surface and then-or beforethe handles 67 are operated to remove the clamping pressure so that the key heads can be removed. The frame 65 and sleeves 64 are then removed and the bolts 62 are replaced by shorter bolts 70. Cement is then deposted on the plate until it attains or projects beyond the level of the top of frame 71, the openings made by the hose sections in the first deposit of cement being incidentally plugged, and then the arched tool, hereinafter referred to, is employed to transversely bow the top of the slab, as explained. A float tool or the like is then employed to taper off the ends of the top surface of the slab, the lines of demarcation developed by giving the ends a downwardly and outwardly sloping flat surface. being of arcuate form. After the upper surface of the slab is shaped as explained, a coating of finer quality of cement is applied to provide a smooth finish. The tapering of one end of the top as at T is for imparting an attractive appearance. The tapering of the other end is to accommodate a head piece.

The next step in the production of the'slab is to provide it with the head piece H having a sloping upper side to contain a copper or equiva lent plate to contain the name and other matter relative to the deceased whose grave or mausoleum is to be identified. To produce the head piece a frame is mounted on the frame 71. head piece frame is constructed as follows:

There are two triangular side plates 81 stand-- ing in vertical planes slightly inward of the vertical planes of the inner surfaces of the side portions or walls of frame '71, and said side plates are offset outwardly at their lower ends to provide downwardly-facing shoulders 82, and

depending walls 83, the latter fitting fiatwise against the outer faces of the side walls of said frame 71 and having outwardly-projecting foot flanges 84. The latter have spaced depending lugs 85 to rest upon the horizontal side flanges of frame 71 and vertically alined upwardly-projecting lugs 86. Bolts 87 are fitted up through the said side flanges and their overlying foot flanges, including the said alined lugs, and are provided with nuts 88 at their upper ends. The,

The

just forward of the end walls thereof, are I notched at 94. This sharp tapering of the front ends of the side plates and the notching of the frame 71 is to enable a workman to trowel effectively at the front corners so that the intersecting surfaces of the head piece may be sharply defined for asthetic appeal.

Bridging the space between the rear ends of side plates 81 is a back plate 95 clamped by devices 96 of the same character as those clamp-- ing the side plates upon frame 71, the lower edge of the back plate being concaved to approximately match the transversely arched top'of the slab and slightly spaced from the latter, and said back plate has a stiffening rib 97 and a central lug 98 near its upper edge, the lug carrying a rearwardly-projecting bolt 99. It also has rearwardlyprojecting lugs 100 against which flatly fits a sheet metal plate 101 having upright slots 102 engaged by clamping bolts 163 mounted in the lugs 1 30. The plate 101 is short enough (see Figure 9) to fit between the sides of frame '71 and is concavedat its lower edge to conform to the cross curvature of the top of the slab. When in operative position the plate is disposed to close the space'between the top of the slab and the lower edge of the back plate 95 and thereby prevent cement used to form the head piece, from working back and producing an unsightly ridge at the junction of the back wall of the head piece with the top of the slab.

Before cement is deposited in the head frame, a rectangular name-plate form frame 104 is arranged within the head frame and disposed in an inclined position with its upper edge in the same plane as the upper edges of the side walls 81. The walls of the said name-plate form framev are provided at their lower edges with inwardly projecting flanges 105. 'The said frame is to provide a recess for the reception of the nameplate in the head piece and the flanges a smooth shoulder for the stable support of the name plate (not shown). To support the name plate form, an arched bar 106 is secured at its ends to opposite side flanges 105 and its bridge or elevated portion is fitted in and clamped at 107 to a-transverse arch 108 secured at 109 to upstanding lugs 110 of the foot flanges of the side plates 81. As a further support, a bar 111 underlies and is secured to the bridge portion of bar 106 and to a channel angle bar 117 secured to lug 98' of the back plate 95, the rear end of bar 111 having a depending 8 shaped arm 113 secured at its lower end to the rear portion of frame 104.

form frame in place as explained plastic cement With the head-piece frame and name plate is deposited within the head-piece form and trowelled to provide an inclined top surface in the same plane as the upper edges of the said forms, but Within the name plate form, the upper surface of the head piece will lie in the plane of the under surface of the said name plate form and the bottom of the recess thus provided for the name plate.

After the slab has set sufficiently, the name plate form is removed, and the head-piece frame is also removed. The frame '71 is also removed and after the lapse of about four hoursya sheet metal hood is fitted over the slab. The hood is stiffened at its margin by angle iron 115 or otherwise, and is equipped with a gasket 116 for engagement with the marginal flange of the plate underlying the slab. Clamps 117 are then engaged with the flanges of the main frame and the stiffening flange of the hood to exert force on the gasket for water-sealing purposes. Water is then supplied to the hood to cover the slab and it is left in this condition about twenty-four hours, and then the Water is drained off through drain plug 118 (Figure 8). The hood and frame 44 are then removed and the crank shaft 40 is operated to raise the slab and the underlying plate and its hollow depending rib high enough to permit of the removal of the angle plates which form the sealing grooves in the slab. The

. hood is then replaced and clamped in position and water is again supplied to the hood so that it shall have access to the surfaces thereof which were inaccessible with the first wetting or ouring treatment. After about another twentyfour hours the slab is thoroughly cured and the water is drained off through drain plug 19 (Figure 8). The hood is then removed to permit of the removal of the slab, the jacks being utilized, if necessary, to raise the slab high enough for convenient accessibility for handling.

From the above description it will be apparent that I have produced cement slab form apparatus embodying the featuresof advantage set forth as desirable in the statement of the of construction and mode of operation involved,

or from the spirit and scope of the appended claims. e

I claim: I

1. A mold comprising an open rectangular frame disposed horizontally and providing up right walls and flanges projecting outwardly from the upper margins of said Walls, a mold plate covering and supported on said flanges and provided with a hollow rib depending within and and paralleling the walls of said frame, plates resting upon the marginal portions of said mold plate and provided at their inner margins with flanges depending into said hollow rib adjacent the respective outer walls thereof and formed with horizontal indentations of ratchet-tooth form in cross section with their abrupt faces disposed downwardly, and means for adjustment upwardly through the mold plate to lift therefrom a cement slab molded thereon and incidentally lift the said indented plates to permit them to be withdrawn laterally from engagement with ribs formed on the slab by the hollow rib and ,provided with external grooves by the indented parts of said plates.

2. A mold comprising an open rectangular frame disposed horizontally and providing upright with a hollow rib depending within and near and paralleling the walls of said frame, plates resting upon the marginal portions of said mold plate and provided with struck-up ribs and also provided at their inner margins with flanges depending into said hollow rib adjacent the respective v outer walls thereof and formed with horizontal indentations of ratchet-tooth form in cross section with their abrupt faces disposed downwardly, and means for adjustment upwardly through the mold plate to lift therefrom a cement slab molded thereon and incidentally lift the said indented plates to permit them to be withdrawn laterally from engagement with ribs formed on the slab by the hollow rib and provided with external grooves by the indented parts of said plates.

3. In a mold for producing cement slabs, an open rectangular frame disposed horizontally, a mold plate thereon, an upstanding rectangular frame secured upon the mold plate above the walls of the first-named frame to define the exterior side edges of the slab to be molded, a rectangular frame spaced from the mold plate and upstanding rectangular frame and disposed above the former and inward relative to the latter, angle brackets connecting the corner portions of the spaced frame with the end portions of said upstanding frame, and connections between the side portions of the spaced frame and the corresponding portions of the first-named and upstanding frames, the last-named connections including independently tiltable portions adjustable to prevent sagging of the side portions of the spaced frame.

4. In a mold for producing cement slabs, an openrectangular frame disposed horizontally, a mold plate thereon, an-upstanding rectangular frame secured upon the mold plate above the walls of the first-named frame to define the exterior side edges of the slab to be molded, a horizontal rectangular frame spaced above the mold plate,

the walls of said frame occupying planes inward of the planes of the corresponding Walls of the upstanding frame, angle brackets connecting the corner portions of the spaced frame with the end portions of said upstanding frame, S-shaped brackets tiltably clamped on the side portions of the first-named and upstanding frames, horizontal angle brackets upon the S-shaped brackets and underlying and engaging the side portions of the spaced frame, and bolts threaded into the S- shaped brackets and slidably engaging and pro.- vided with shoulders bearing inwardly against said angle brackets.

5. A mold comprising an open rectangular frame, a mold plate overlying and resting on said frame and provided adjacent the side and end walls thereof with a depending hollow rib forming a continuous channel, an upstanding wall paralleling the margin of the rectangular frame outward of said hollow rib and secured upon the marginal portion of the mold plate, a hood over the mold plate and the upstanding wall and having a water-sealing relation at its lower margin with said upstanding flange; the mold plate having a plurality of spaced openings and movable plates filling said openings, means for projection up through the mold openings to cause said plates to lift an overlying cementitious slab off the mold plate to permit water Within the hood to contact directly with the entire surface of the slab except Where the latter is engaged by said lifted plates, and flexible water sealing means between the mold plate and lifting means to catch and retain water flowing down through the mold plate openings around the lifting means.

6. The combination with a horizontal frame and a mold plate thereon upon which a cement slab is molded, of a head piece mold removably mounted on the frame and plate over the slab and comprising a pair of upstanding members of triangular form, the hypotenuse edges being similarly inclined, the walls being offset outwardly near their lower edges to provide downwardlyfacing shoulders, a back wall spanning the space between and abutting the rear ends of said members, and an adjustable plate fitting flatly against the rear face of the back plate and slidable up- Ward or downward relative to the slab.

'7. The combination with a horizontal frame and a mold plate thereon upon which a cement slab is molded, of a head piece mold removably mounted on the frame and plate over the slab and comprising a pair of upstanding members of triangular form, the hypotenuse edges being similarly inclined, the walls being offset outwardly near their lower edges to provide downwardlyfacing shoulders, a back wall spanning the space between and abutting the rear ends of said members, an adjustable plate fitting flatly against the rear face of the back plate and slidable upward or downward relative to the slab, and a name plate mold removably suspended within the head piece mold and bearing a fixed relation thereto.

8. A mold comprising an open horizontal oblong rectangular frame having step-shaped walls providing riser portions, upper outer step portions and inner bottom step portions, a form plate spanning the frame and resting upon the outer step portions and provided with a depending annular hollow rib resting on the inner bottom step portions and against the inner sides of the riser portions, and provided with spaced openings in the portion surrounded by the annular rib, crossmembers fitting the underside of the form plate and the inner faces of the longer sides of said rib and underlying and secured to the bottom side steps of said frame, said cross-members having openings registering with but smaller than the openings of the form plate, and plates for fitting in and closing the last-named openings and resting upon said cross-members.

9. A mold comprising an open horizontal oblong rectangular frame having step-shaped Walls providing riser portions, upper outer step portions and inner bottom step portions, a form plate spanning the frame and resting upon the outer step portions and provided with a depending annular hollow rib resting on the inner bottom step portions and against the inner sides of the riser portions, and provided with spaced openings in the portion surrounded by the annular rib, crossmembers fitting the underside of the form plate and the inner faces of the longer sides of said rib and underlying and secured to the bottom side steps of said frame, said cross-members having openings registering with but smaller than the openings of the form plate, plates for fitting in and closing the last-named openings and resting upon said cross-members, filler plates secured at the undersides of the cross-members and provided with openings registering with the openings of said members, plates secured to andunderlying the filler plates and having openings registering with but smaller than the openings of the filler plates, jack-heads carrying the plates closing the form-plate openings, and fittingthe openings of the cross-members and filler plates and resting on and depending through the openings of the plates underlying the filler plates, and

a rotatable lifting means for and swivelled to each of said jack-heads.

10. A mold comprising an open horizontal oblong rectangular frame having step-shaped walls providing riser portions, upper outer step portions and inner bottom step portions, a form plate spanning the frame and resting upon the outer step portions and provided with a depending annular hollow rib resting on the inner bottom step portions and against the inner sides of the riser portions, and provided With spaced openings in the portion surrounded by the annular rib, crossmembers fitting the underside of the form plate and the inner faces of the longer sides of said rib and underlying and secured to the bottomside steps of saidframe, said cross-members having openings registering with but smaller than the openings of the form plate, plates for fitting in and closing the last-named openings and resting upon said cross-members, filler plates secured at the undersides of the cross-members and provided with openings registering with the openings of said members, plates secured to and underlying the filler plates and having openings registering with but smaller than the openings of the filler plates, jack-heads carrying the plate closing the form-plate openings, and fitting the openings of the cross-members and filler plates and resting on and depending through the openings of the plates underlying the filler plates, rotatable lifting means for and swivelled to each of said jackheads, and a flexible tube secured at one endto the upper end of each jack at the bottom of the head thereof, and at its opposite end to the plate through which the respective jack-head depends, the respective ends of the tube being secured to provide water-tight joints.

11. In a mold, an open oblong rectangular frame, cross-bars connecting the long sides of the frame, a form plate spanning the frame and resting upon the sides and ends thereof and provided with hollow side and end ribs depending into the frame, angle plates resting; flatly upon the marginal portions of the form plate and deform plate, and an oblong rectangular frame fitting on said bolts at the upper ends of said short pending into the hollow ribs and fitting against theouter walls thereof, an open oblong rectangular frame secured upon theouter arms of said angle plates to define the outer edges of a concrete slab to be molded, a series of vertical sleeves disposed inward of the hollow rib of the form plate and projecting through and secured to the latter and to the respective cross-bars, bolts extending through said sleeves, a rectangular an' the frame,*a form plate spanning the frame and restingupon the sides and ends thereof and providedwith hollow side and end ribs depending into the frame, angle plates resting flatly upon the marginal portions of the form plate and depending into thehollow ribs fitting against the outer walls thereof, an open oblong rectangular frame secured upon the outer rms of said angle plates to define the outer edges of a concrete slab to be molded, a series of vertical sleeves disposed inward of the hollow rib of the form plate and projecting through and secured to the latter and to the respective cross bars, bolts extending through said sleeves, short sleeves loosely surrounding the bolts above and resting upon the form plate, and an oblong rectangular frame fitting on said bolts at the upper ends of said short sleeves and providing upstanding walls paralleling and disposed inward of the walls of the rectangular frame for defining the upper side of part of the slab to be molded.

13. In a mold, an open oblong rectangular frame, cross-bars connecting the long sides of the frame, a form plate spanning the frame and resting upon the sides and ends thereof and provided with hollow side and end ribs depending into the frame, angle plates resting flatly upon the marginal portions of the form plate and depending into the hollow ribs and fitting against the outer walls thereof, an open'oblong rectangular frame secured upon the outer arms of said angle plates to define the outer edges of a concrete slab to be molded, a series of vertical sleeves disposed inward of the hollow rib of the form plate and projecting through and secured to the latter and to the respective crossbars, bolts extending through said sleeves, short sleeves loosely surrounding the bolts above and resting upon the sleeves and provided with depending sleeves for fitting within said shortsleeves and restingf'upon the upper ends of the sleeves secured to the form plate and cross-bars.

14. The combination with an open rectangular frame for defining the edgesof a part of a cement slab and as gages for defining the. top surface of the slab, of a head-piece mold comprising a back wall spanning the frame from side to side and resting thereon, anda pair of. triangular sides paralleling and inward of the sidesiof said frame and having outwardly offset lower, ends resting upon and depending walls outward of thesides of saidframathe depending Walls having foot flanges, and removable camoperating means for clamping the foot flanges in rigid rela.-.

tion to the sides of said frame.

15.A mold comprising an open rectangular frame, a mold plate overlying and resting on said frame and provided adjacent the end and side wallsthereof with-.adepending hollow rib and at intermediate points with openings, filling plates for said openings, means adjustable up 16. A mold comprising an open rectangular frame, a mold plate overlying and resting on said frame and provided adjacent the end and side walls thereof with a depending hollow riband at intermediate points with openings, filling plates for said openings, means adjustable up through said mold plate openings and engaging the lower sidesof the: filling plates to lift the same, said filling plates and a'c'ement slab when such slab rests on said filling plates and mold plate, flexible tubes secured to and in water-tight relation at their opposite ends with the mold plate around said mold plate openings and with the said adjustable means, uprightscrewrods in threaded relation to the frame and swivelled at their upper ends to said adjustablev means and inclosed at and below the swivelled points by the lower ends of said fiexibletubes in a water-tight relation.

17. A mold comprising an open rectangular frame, a mold plate overlying and resting onsaid frame and provided at intermediate points with openings, plates'normally filling said openings,

headers underlying and supporting said plates and adapted to be moved through said openings, 2. plate underlying and rigid with the form plate and underlying the marginal parts of the headers,

means engaging the headers and movable 'verti-' cally to raise the-latter and, the filling. plates to lift a concrete slab off the form plate-and flexible Water-seal connections respectively inclosing the headers and the upper ends of the liftingmeans.

where the latter engages the headers;

GROVER W. 'GILLELAND. 

